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Sept. 22, 1925.

F. J. TILLMAN COMPUTING MACHINE Filed Deo. '12, 1919 l 2 Sheets-Sheet l /lbl' 41'? 4448 ,Diventa ,f

Sept. 22, 1925.

F. J. ATILLMAN COMIUTING MACHINE Filed Dec. 12, 1919 2 sheets-sheet 2 'P AT E GFFICE.`

FERDINAND il'. TILLMAN, 0F ST.^LOU1%, MlISSOUR.

contromano MACHINE?.

Application filed )December 12, 1919. Serial` No. 344,367.

To all whom t may Gomera:

lBe it known that 1, FERDINAND TILL- MAN, a citizen ot the United States of Amer'- ica, and a resident of the city of St. Louis and State of Missouri, have invented certain new and useful ltmprovements in a Computing Machine, of which the following is a specification. l

rFhe primary'object of this invention is to provide a computing machine where a number ot calculations can be inscribed upon a drurn or table, and whereby any set of calculations inscribed upon the drum or table can be selected through a key lever mechanism.

Another object ci; the invention is to provide a slidablc scale for changing the decimal point ot a calculation from one point to another point. l

@ther and further objects will appear in the specifications and appended claims.

Fig. 1 is a plan view of the computing machine having the intermediateparts thereof broken away.

Fig. 2 is a side elevation of Fig. 1.

Fig. 3 is an end elevation of Figures l and 2,-partly in section and part thereot broken away. t

Fig. a is a fragmentary portion of the drum periphery showing a portion ot the calculating table.

Referring to the drawings 1 designates the base ot the machine; 2, 3 and 4 are upward l extending supporting posts; 5 is a long drive shaft that passes throu h the bearings 2, 3 and 4, and has securely astened to one end a gear 3. Located between the supporting posts 2 and 3 and securelyv fastened to the drive shat't 5 is an indicating drum 9, containingon its periphery 100 rows of calculations, and between the supporting posts 3 and t and securely `fastened to the drive shaft 5 is a stop drum l0, containing ten stop teeth 11 that are spaced apart in spiral shape throughout the length ot the stop drum 10. `lUpon the lett side ot' the supporting post .e and pivoted near the rear ot 'the machine and meshing with the gear 8 is a sector 12, which is pivoted at 13 to an upward extending supporting post 1li. 'lhis sector 12 has secured thereto a spring stud l5 over which a strong spring 15 is attached. The opposite end ot' the strong spring 1G is attached to stud 1'? on the supporting post r`Fhis strong spring i6 has a tendency 'to for-ce the sector l2 rearwardly andcause the ysector teeth 18 to force the gear 8 in the direction indicated by the arrow as shown in Figure 3, and thereby torce the indicating drum 9 and the stop drum 10 in the direction indicated by the arrow. 19 is a holding pin securely fastened to the indicating drum 9. 20 is a bell crank stop arm pivoted at 21 to a bearing-23.. This bearing 23 is securely fastened to the base 1. e

One end of the bell shaped stop arm 20 is provided with a notch 24 adapted to receive the holding pin 19, and the other end of the above crank arm 20 is provided with a release key 25, and on the lower end of the bell crank holding arm 2O is a holding abutnient 26 which is adapted to engage an abutting pin 27 on the bearing 23. 28 is a spring that is fastened at one end to an extension 29 on the bearing 23 and its opposite end is fastened to an extension 3l on the bell crank holding arm 20. This spring has a tendency to hold the b ell crank holding arm rearwardly and its holding abutment 26 against the abutting pin 27, and thereby holding the upward end of the bell crank holding arm 2O in the path of the holding pin 19. lt will now be seen that if the release key on the forward end of the bell crank holding arm 20 was depressed, the holding notch 24 would release the holding pin 19 on the indicating drum 9 and would allow the strong spring 16 to pull the sector 12 rearwardly and through the teeth of the sector 18 the drive shaft 5 would be revolved and the indicating drum 9 and the stop drurn 10 would also be revolved until stopped by the mech.- anisin which will now be described.

As before described the stop drum'l contains 10 stop teeth 11 that are spaced apart spiral shape around the stop drum 10. rllhese stop teeth 11 are adapted to be engaged and be stopped by the stopping tooth 36 that will now be described (best shown in Figures 2 and 3). Slidably mounted between an upper extension 3a and a lower extension 3b of the bearing 3 is a vertical slide rod 31, and slidably mounted between the upper extension 4a and the lower extension lb of the bearing l is a vertical slide rod 32, securely fastened in these slide rods 31 and 32 are two guide rods 33 and 3d, and slidably mounted on these guide rods 33 and 3ft is a slidable carriage 35 containing a stop tooth 33 that is adapted to be positioned in front oj any one of the stop teeth l1 of the stop drinn 10. 3'? is a forked arm that straddles the slid- Cil' able carriage 35. The opposite end of this forked arm 37 is securely fastened to a rock shaft 38 and the rock shaft 38 is rockably mounted in the base 1 and its upper end is rockably mounted at 39 in a bearing 40, the bearing 40 being securely fastened in the base 1 by screws 41. Upon the lowe end of the rock shaft 38 is a ysetting arm 42 containing a setting handle 43 and a pointer 44. The pointer 44 1s adapted to co-operate with a scale 45 best shown in Figure 1.

It will now be understood if it is desired to set the stop tooth 36 into the path of any one of the stop teeth 11 of the stop drum 10, the handle 43 is moved along the scale 45 and through the rock shaft 38 the fork arm 37 will move the stopping tooth 36 into a position to engage and stop one of the stop teeth 11 of the stop drum 10; that is, if the pointer is opposite the numeral 1 on the scale 45 the stop drum 10 and the indicating drum 9 will be allowed to travel one-tenth of a revolution until its stop tooth 11 engages the stop tooth 36, and if the pointer 44 is moved to Vtwo on the scale 45 the stop drum 10 and the indicating drum 9 will move two-tenths of .a revolution before being stopped by the stop tooth 36, and if the pointer 44 is placed opposite the numeral 3 the stop drum 10 and the indicatigdum 9 will move three-tenths of a revolution before its stopping tooth 11 en ages the stop tooth 36, this being the inetho of stopping the inf dicating drum 9 at any one of 10 of its `100 stops. If it is desired to stop the indicating drum 9 at a point that is not a fraction of ten then the second selecting arm48 is operated as will now be described.

Pivoted to the lower portion of the base 1 at 47 is a second selectin arm 48, provided on its forward end wit a settin handle 49, and a setting pointer 50. VThis setting pointer 50 is also ada ted to be set along the scale 45, the rearwar end of the selecting arm 48 is provided with a fork that is adapted to straddle a setting pin 51 on a step plate 52. This step plate 52 is slidably vmounted on guide rods 53 and 54. These guide rods 53 and 54-are rigidly and securely fastened in the lower end of the supporting posts 3 and 4, and it will be understood when the setting handle 49 is moved along the scale 45 that the forked end of the selecting arm 48 will force the setting in 51 to the left and it will be understood t at as the setting pin 51 is moved to the left that the stop plate52 will also be moved to the left. This stop plate 52 is provided with steps 55 which are adapted to be en aged by a pin 56 on the guide rod 34 an as the guide rod 34 is supported by the slidable posts 31 and 32, it will be understood that when the stop tooth 36 is engaged by a sto tooth 11 that the slidable post 31 and 32 wi l be forced downwardly until the pin 56 engages one of the steps 55 on the stopping plate 52.

As the stop tooth 36 can select any one of the ten stops on the indicating drum 9 and can be forced downwardly until the pin 56 on its supporting post 34 engages any one of the ten stops 55 on the stop plate 52, through the ten stopping teeth 11 on the stop drum 10, the drum 9 may be stopped at any one of 100 points. As each step 55 represents a unit and each stop tooth 11 corresponds respectively to 0, 10, 20, etc., each stop 55 represents but one tenth of each stop tooth 11. In this connection if it is desired to stop at 25; the handle 43 is placed at the numeral 2, and thehandle 48 is placed at the numeral 5 on the scale 45, the releasing key 25 is then depressed and the spring 16 on the sector 12 will cause the gear 8 and the drive shaft 5 to rotate, and carry with it the indicating drum 9 and the stop drum 10, until the stop tooth 11 equal to 20/100 engages the stop tooth, 36, and as the stop tooth 36 is adapted to yield through the slidable posts 31 and 32,'the slidable posts 31 and 32 and the guide rods 33 and 34 and the stopping tooth 36 will be lowered until the pin 56 on the guide 34 engages the lifth -step 55 on the stop plate 52 before the stop pin 56 is finally stopped. Therefore, the indicating drum 9 and the stop drum 10 has traveled 2/10 of a revolution before engaging the stop tooth 36, and then was allowed to travel the distance of five steps or an additional 1/20 revolution before the pin 56 was engagedby the 5th step 55 of the plate 52. In all the drum 9 has traveled 25/100 revolutions before being stopped.

It will therefore be understood that any one A`of a hundred stops can be selected through the selecting levers 43 and 49.

Mechanism to 'return he sector zml drums to their normal position.

'Located next to the sector 12 is a returning handle 60. This returning handle 60 is pivoted atf13 to the bearing 14 and carries a pin 62, that is adapted to ride in a slot 63 on the lower part of the sector 12, and when the returning handle 60 is lowered manually, the pin 62 will ride idly until it engages the end of the slot 63, and it will then carrv the sector back with it until the holding pin 19 on the drum 9 rests on the top of the holding arm 20, in which position it is again held until tripped by the releasing key 25.

lBelow the sight openings 70 is provided a slidable scale 65. This slidable scale 65 has a number of decimal points 69 inscribed on the scale. This scale is adapted to be moved to the left or right so as to change the decimal of all the figures shown 4through the sight opening 70 and for positioning the decimal points a pointer 65a is provided on the scale 65. 68l is a knob for moving the scale to the left or to the right.

Upon the slidable posts 31 and 32 are two returning springs 7l and 72 that normally tend to hold the supporting posts 31 and 82 in a raised position.V

This machine is especially of service in making has a set of 100 calculations inscribed upon its periphery, and in making up the tax bill the handles 43 and 48 can be set according to the amount ofthe valuation of the property to be taxed, and the release key 25 can then V be operated and the amount of the taxes will appear in the sight opening 70. For example, if the property is valued at $1900, the handle 43cwill be placed opposite the numeral 1 on thescale 45, and the handle 49 will be set opposite the numeral9 on the scale 45and thel release key is then operated, and the indicating drum 9 will be revolved and stopped in a position to correspond with the tax and tax assessments of a given locality corresponding to 19. Assuming that the tax assessments of a given locality is on a one-tenth or one-hundredth proportion of a given schedule, if the decimal point is moved to hundredsthe amount will correspond with 1900 and each tax, such as the school tax, the general tax,

55, 62%@ 75, 871/3@ $1.00, $1.25, and so' o n. In iguring up the wages for the number of hours or fraction thereof in tenths, the number of hours is setby setting handle 43, and the fraction of the hour is set by the setting handle 48, and the release key 25 is then depressed, and the amounts' due for the number of hours and fraction thereof as set throughthe handles 43 and 48 will a pear through the sight opening 70 below tliie amount that the working man received per hour. If it is desired to igure'weekly pa at so many hours, the decimal point can be -moved and the weekly pay also figured. For example if a workingman receives $1.00 an hour, and works 4.8 hours, the setting handle 43 is placed at 4 and the setting handle 49 is placed at 8, and the releasekey 25 is operated, and the amount $4.80 will appear in the sight opening over the dollar. If the workingman has Worked 48 hours in place of 4.8 hours, the same keys are operated but the-decimalv is moved one positax bills, as the indicating drum 9 I tion `and through the sight opening the amount $48.00 in place of $4.80 will appear. This machine can also be used infiguring interest, etc. by furnishing a drum with the proper calculations inscribed thereon.

What I claim is:

I. A computing machine comprised of a revoluble drum adapted to contain a plurality of characters arranged on its peripheral face, a series of stopping vmembers turnable with said drum, means for automatically revolving said drum, an adjustable member containing graduated engaging portions for respective cooperation with each of said stopping members, for limiting the travel of said drum, a laterally and vertically movable element adapted to be positioned in the path of travel of any one of said stopping members and having means cooperating with said stopping members and any one of the graduated portions of said adjustable member according to its position, and releasing means for allowing said drum to rotate.

2. In a computing machine, a revoluble drum adapted to contain a chart upon its periphery, a plurality of radially arranged another, means for revolving said drum, re-

leasable means for allowing said 'drum to be moved, a slidable stop tooth adapted to be positioned inthe pathof travel of any one of said stopping members and to be moved thereby, and adjustable means provided for limiting the distance of movement given to said stop tooth by anyone of said stopping members 4. In a computing machine, a revoluble drum adapted to contain a chart upon its periphery, a plurality of radially arranged stopping members to be turned with said drum located in staggered relation to one another, a slidable stop tooth adapted to be positioned in the path of travel of any one of said stopping members and to be moved thereby, adjustable means provided for limiting the distance of movement given to said stop tooth by any one of said stopping members, and a slidable gaging member arranged longitudinally acrossthe periphery of said drum. `y

5. In a computing machine, a revoluble drum adapted to contain a chart upon its periphery, a plurality of radially arranged` another, a slidable stop tooth adapted to* be positioned in the path of travel of any one of said stopping members and to be moved downwardly thereby, and adjustable means comprising a slidable member having v a plurality of graduated step-portions cor- 10 responding to the number of said stopping members for limiting the distance of movement given to said stop tooth by any one of said stopping members.

FERDINAND J. TILLMAN. 

